There is some antibiotic resistance on the 10^-3 tetracyline plate. This is seen when comparing the number of colonies on the Nutrient agar plate and the tetracline plate. There are less colonies on the nutrient plus tetracycline plates compared to the just nutrient plates. This indicates the antibiotics are working to kill the bacteria. If the bacteria grew anyway, which is known as antibiotic resistance. There is clear evidence that the presence of the tetracycline is enough to really prevent and limit bacteria growth. there is roughly 25species of the bacteria which were unaffected by the tetracycline.

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The gram stain performed showed us that the bacteria from plate 10^-3 with tetracycline is gram positive and is antibiotic resistant to tetracyline. while the other 2 samples from 10^-5 and 10^-5 with tet. were both gram negative. Both gram positive and gram negative are known to have species that are resistent to tetracyline. LL

Latest revision as of 13:54, 16 February 2014

2/16/14 - Lab 3:Microbiology and Identifying Bacteria with DNA

Introduction:

Materials and Methods:

1.Using the swirled up Hay infusion from Lab 1 and 2, 100 ml of the hay infusion culture was added to 10mls of nutrient broth into a tube. This made a 1:100 dilution or 10^-2. Next 100microliters from that tube was placed into 10mls of nutrient broth to make a dilution of 1:10,000 or 10^-4. Next 100microliters from tube 4 was placed into 10mls of nutrient broth to make a dilution of 1:1,000,000 or 10^-6. Next 100microliters from tube 6 was placed into 10mls of nutrient broth to make a dilution of 1:10,000,000 or 10^-8.

2. Four nutrient agar plates were labeled. 10^-3, 10^-5,10^-7,10^-9. Another set of Agar plates with tetracycline were labeled with the same labels.

3. 100 microliters of the 10^-2 solution was placed on the surface of the 10^-3 agar plate and the 10^-3 agar plate with tetracycline. 100 microliters of the 10^-4 solution was placed on the surface of the 10^-5 agar plate and the 10^-5 agar plate with tetracycline. 100 microliters of the 10^-6 solution was placed on the surface of the 10^-7 agar plate and the 10^-7 agar plate with tetracycline. 100 microliters of the 10^-8 solution was placed on the surface of the 10^-9 agar plate and the 10^-9 agar plate with tetracycline.

Results and Conclusions:
There is some antibiotic resistance on the 10^-3 tetracyline plate. This is seen when comparing the number of colonies on the Nutrient agar plate and the tetracline plate. There are less colonies on the nutrient plus tetracycline plates compared to the just nutrient plates. This indicates the antibiotics are working to kill the bacteria. If the bacteria grew anyway, which is known as antibiotic resistance. There is clear evidence that the presence of the tetracycline is enough to really prevent and limit bacteria growth. there is roughly 25species of the bacteria which were unaffected by the tetracycline.

The gram stain performed showed us that the bacteria from plate 10^-3 with tetracycline is gram positive and is antibiotic resistant to tetracyline. while the other 2 samples from 10^-5 and 10^-5 with tet. were both gram negative. Both gram positive and gram negative are known to have species that are resistent to tetracyline. LL

2/9/14 - Lab 2: Identifying Algae and Protists

Introduction: Understanding and Identifying Unicellular Organisms, specifically Algae and Protists. Algae and Protists have very specialized characteristics. While they are different organisms they both come from a common ancestor and are both unicellular eukaryote.

Materials and Methods:
- A wet mount was created using 8 different known organisms
--> A drop of the specimen solution containing various organisms were placed on the slide and covered with a coverslip
-The wet mount and specimens were viewed under tthe microscope
-Once an organism was located it was characterized using a Dichotomous Key

-Smalls musty
-mold is growing on the sides
-Leaves and plants are on the top layer
-Algae is growing on the very bottom of the jar
-algae coating on the top.

-Top of Jar: Brown Algae

-Immobile
-10 micrometers in length

-Bottom of Jar:

-Spirostimum
-brown algae
-Colpidium - 62 micrometers

Conclusions: The hay infusion is expected to grow more mold agae and other organisms. The smell is expected to get progressively worse. The niches are expected to become more specialized and more organisms with more distinct roles will develop. LL

1/31/14 - Lab 1: Biological Life at AU

The objective of Lab 1 Proceedure 1 is to understand Natural Selection. To get an understanding of natural selection 3 members of the volvacine line were observed under the microscope. They included Chlamydomonas, gonium, and volvox.